Operators are the symbols which perform the operation on the some values. These values are known as operands. Java have following operators –

  • Arithmetic Operators
  • Relational Operators
  • Logical Operators
  • Assignment Operators
  • Bitwise Operators
  • Misc Operators

 
Arithmetic Operators

OperatorOperator NameDescriptionExample
+AdditionAdds two operandsI = 40, J= 20I + J = 60
SubtractionSubtracts second operand from the firstI = 40, J= 20I – J = 20
*MultiplicationMultiplies both operandsI = 40, J= 20I * J = 800
/DividePerform division operationI = 40, J= 20I / J = 2
%ModulusReturn the remainder after DivisionI = 40, J= 20I % J = 0
++IncrementIncrease the operand value by 1I=40,I++ = 41++I  =  40 (print 40 but next time its value is 41)
DecrementDecrease the operand value by 1I=40I– = 39–I =  40(print 40 but next time its value is 39)

 
2. Relational Operators
It is also known as comparison operator because it compares the values. After comparison it returns the Boolean value i.e. either true or false.

OperatorOperator NameDescriptionExample
==Equal toIf the values of two operands are equal then it returns true.I = 20, J = 20(I == J) is true
!= Not Equal toIf the values of two operands are not equal then it returns true.I = 20, J = 20(I == J) is False
<Less thanIf the value of left operand is less than the value of right operand then it returns trueI = 40, J = 20(I < J) is False
>Greater thanIf the value of left operand is greater than the value of right operand then it returns trueI = 40, J = 20(I > J) is True
<=Less than or equal toIf the value of left operand is less than or equal to the value of right operand then it returns true.I = 40, J = 20(I <= J) is False
>=Greater than or equal toIf the value of left operand is greater than or equal to the value of right operand then it returns true.I = 40, J = 20(I >= J) is True

 
3. Logical Operators

OperatorOperator NameDescriptionExample
andLogical ANDWhen Both side condition is true the result is true otherwise false2<1 and 2<3False
orLogical ORWhen at least one condition is true then result is true otherwise false2<1 or 2<3True
notLogical NOTReverse the conditionNot(5>4)False

 
4. Assignment Operator

OperatorOperator NameDescriptionExample
=AssignmentIt assigns value from right side operand to left side operandI = 40 It assigns 40 to I
+=Add then assignIt performs addition and then result is assigned to left hand operandI+=J that meansI = I + J
-=Subtract then assignIt performs subtraction and then result is assigned to left hand operandI-=J that meansI = I – J
*=Multiply the assignIt performs multiplication and then result is assigned to left hand operand.I*=J that meansI = I * J
/=Divide then assignIt performs division and then result is assigned to left hand operandI/=J that meansI = I / J
%=Modulus then assignIt performs modulus and then result is assigned to left hand operandI%=Jthat meansI = I % J
<<=Left shift AND assignment operatorIt performs Binary left shift and then result is assigned to left hand operandI<<=5 that means
I = I << 5
>>=Right shift AND assignment operatorIt performs Binary right shift and then result is assigned to left hand operandI>>=5 that means
I = I >>=5
&=Bitwise AND assignment operatorIt performs bitwise AND and then result is assigned to left hand operandI &= 5 that meansI = I & 5
^=bitwise exclusive OR and assignment operatorIt performs bitwise exclusive OR and then result is assigned to left hand operandI ^= 5 that meansI = I ^ 5
|=bitwise inclusive OR and assignment operatorIt performs bitwise inclusive OR and then result is assigned to left hand operandI |= 5 that meansI = I | 5

 
5. Bitwise Operators
It performs bit by bit operation. Suppose there are two variable I = 10 and J = 20 and their binary values are
I = 10 = 0000 1010
J = 20 = 0001 0100

OperatorOperator NameDescriptionExample
&Binary ANDIf both bits are 1 then 1 otherwise 0 I & J0000 0000
|Binary ORIf one of the bit is 1 then 1 otherwise 0I | J0001 1110
^Binary XORIf both bit are same then 0 otherwise 1I ^ J0001 1110
~Binary ComplementIf bit is 1 the make it 0 and if bit is 0 the make it 1~I1111 0101
<<Binary Left ShiftThe left operand is moved left by the number of bits specified by the right operand.I << 2 will give 240 i.e. 1111 0000
>>Binary Right ShiftThe left operand is moved right by the number of bits specified by the right operand.I >> 2 will give 15 i.e. 1111
>>>Shift right zero fill operatorLeft operand is shifted right by the no. of bits specified by right operand and shifted values are filled up with 0.I >>>2 will give 15  i.e. 0000 1111

 
Misc Operators
 Some misc operators are:
1. Conditional Operator ( ? : )
It is also known as ternary operator that means it consists of three operands and performs Boolean expression.
Syntax

variable i = (condition) ? value1 (if condition is true) : value2( if condition is false)

e.g.

public class Intellipaat {
public static void main(String args[]){
int i, j;
i = 20;
j = (i <=50) ? 20: 60;
System.out.println( "Value of j is : " +  j );
}
}

Compile and execute above program.
Output
Value of j is : 20
 
2. instanceof Operator:
It is used only for object reference variables. It checks that whether the object is of interface type or class type.
Syntax:

(Object_reference_variable ) instanceof  (interface/class type)

e.g.

public class Intellipaat {
public static void main(String args[]){
String name = "intellipaat";
boolean outcome = name instanceof String;
System.out.println( outcome );
}
}

Compile and execute above program.
Output
true
It returns true because name is a type of String.
 
Operators Precedence in Java:

Category Operator Associativity 
Postfix() [] . (dot operator)Left toright
Unary++ – – ! ~Right to left
Multiplicative* / %Left to right
Additive+ –Left to right
Shift>> >>> <<Left to right
Relational> >= < <=Left to right
Equality== !=Left to right
Bitwise AND&Left to right
Bitwise XOR^Left to right
Bitwise OR|Left to right
Logical AND&&Left to right
Logical OR||Left to right
Conditional?:Right to left
Assignment= += -= *= /= %= >>= <<= &= ^= |=Right to left
Comma,Left to right

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